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Average WAR by Age, 1980s

Posted by
John Autin

Here's my second pass at this study, using a different and larger time span (1980s), a lower threshold of inclusion (min. 140 PAs), and excluding first-year players. Once again, this is for position players only.

This graph shows an earlier and broader peak, from age 24-27, with odd spikes at 30 and 33.

I welcome your observations & suggestions.Notes:

Each age group had between 155 and 319 players.

"WAR/650 PA" is based on the combined raw totals of WAR and PAs for each age group, then expressed per 650 PAs. This minimizes the impact of performance outliers with low PAs.

"Avg. WAR" is the unweighted average of the individual WAR totals for each age group. Each player has equal weight in this figure, no matter how much he played.